Characteristics of Co-flow Jets from Orifices
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T. Srinivasarao
Abstract
This paper presents the results of high-speed co-flow jets from orifices with two annular gaps tested with a single feed system. The co-flow models consist of a primary orifice of 10 mm diameter (D) surrounded by 12 secondary orifices of 0.3D diameter each, positioned in an annular fashion around the primary orifice. The annular gap between the edge of primary orifice and the secondary orifices were 0.15D and 0.45D. The co-flow is found to reduce the potential core of the primary jet at Mach numbers 0.2, 0.4, 0.6, 0.8 and 1.0. The nozzle pressure ratios corresponding to Mach numbers 0.2, 0.4, 0.6, 0.8 and 1.0 are 1.02, 1.12, 1.28, 1.52 and 1.89, respectively. The 0.45D annular gap is found to be more efficient in promoting the mixing of the primary jet.
©2014 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Analysis on Impulse Characteristics of PDRE with Exhaust Measurements
- Scramjet Propulsive Flowpath Design and Numerical Simulation
- Base Pressure Control with Annular Ribs
- Weighted Fuzzy Risk Priority Number Evaluation of Turbine and Compressor Blades Considering Failure Mode Correlations
- Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
- Characteristics of Co-flow Jets from Orifices
- Experimental Investigation of the Loss Coefficients in a Linear Cascade
- Application of the Ultrasonic Oil Film Thickness Measurement System in Bearing Chambers
- Fatigue Lifetime Assessment of Aircraft Engine Disc via Multi-source Information Fusion
- Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
- Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller
